We use the equation d = 1/2*gt^2. Solving for t gives us t = sqrt(2d/g). Substituting 20m for d and 9.8m/s^2 for g, we get t = sqrt(2*20m/(9.81m/s^2)) = 2 seconds.
Charles A.
asked • 09/20/14Worded math
A penny is dropped with no initial velocity from a 20-meter-high balcony into a fountain. How long does it take for the penny to reach the fountain? Round to the nearest hundredth.
Follow
•
2
Add comment
More
Report
1 Expert Answer
Still looking for help? Get the right answer, fast.
Ask a question for free
Get a free answer to a quick problem.
Most questions answered within 4 hours.
OR
Find an Online Tutor Now
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.
